Is Cheboygan County, MI a radon risk area?

EPA's own radon map rates Cheboygan County zone 3 - low potential, predicting a county-wide average indoor level below 2 pCi/L. That puts Cheboygan County in the 16th percentile nationally for radon potential — higher than 16% of the counties EPA has rated.

Where Cheboygan County sits nationally

About 25,964 people live in Cheboygan County, Michigan, spread over 715.284 square miles. Averaged across its land area, Cheboygan County runs about 36 people per square mile. Rank 531 by population within its EPA zone puts Cheboygan County at the 49th percentile among zone peers. Cheboygan County falls in EPA Radon Region 5, one of 524 counties nationally EPA assigns to that same geologic province.

What this actually means for a house in Cheboygan County

At Zone 3, Cheboygan County's predicted county average is under the national indoor average (~1.3 pCi/L) and well below EPA's 4 pCi/L action level — outdoor air nationally runs about 0.4 pCi/L for comparison. Even at Zone 3, Cheboygan County homes are not guaranteed a low reading — zone is a county-wide average, and EPA recommends testing every home regardless of zone.

Next steps for a home in Cheboygan County

Nothing about Cheboygan County's EPA zone changes the mitigation number: $800–$2,500 nationally (around $1,200 typical), set by the house's foundation rather than the county it sits in — and only relevant once a test actually clears 4 pCi/L.

Find Michigan's state radon program

Cheboygan County's test kit answers today; a Airthings radon monitor keeps answering for Cheboygan County over time. Affiliate link, RadonZoneCheck earns a commission there, at no extra cost to you. Code RADONZONE-10OFF takes 10% off at checkout.

More on how this number was built

Every figure on this page traces to EPA's own Map of Radon Zones and Census data, documented in the methodology guide. Whatever zone Cheboygan County carries, the zone explainer covers what it does and doesn't tell you about any one house.